Metal bending and straightening apparatus.



No. 826,289. PATENTED mm 17, 1906.

1'. GILMER. METAL BENDING AND STRAIGHTBNING APPARATUS.

APPLICATION FILED FEB-14,1906.

-WITNE88E8: l/Vl/EN 05 ice frame l of my machine is given any convenient form and is provided with Slll'i'r end of the machine, short shaft 12, suitably mounted in the bed 3,

' which is circular in cross-section.

mo ve through UMTEE; 'L A NDlNG Ami?- 55'? Z"WELL GlLMElt, OF N Specificationof Letters Patent.

Patented July 1 7, 1 9085 Application filed February 14,1906. Serial No. 300,974.

2?) rtZZ whom it mcty eon aerial:

Be it known that l. TAZEWELL Gimme, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, coimty of Kings, and State New York, have invented a new and useful IIIlPlOVnmeat in MetalBehding and Straightening" Apparatus, of which the following is a descriptio o The object of myihvehtion to provide a masses of, this class that will straighten any forii'i ofinetal bar or tube and do this with- .juiy even to the thinnest tube. This s sccou'iplished by my invention, one meet or which is hereinafter disclosed. For emote particular description of my in veutioin reference is to be had to the accom.

rving drawings, in Whicl1=- 2, ire l is a plan view of myiiuproved macoo. Fig. 2 is a side elevation of the same. rout both views of the drawings oronce characters designate similar The bed 3 is made suffi rigid to Withstand without bending the stresses incident to its use.

Power to run the machine is derived through a belt 4, pulley 5, and shaft 6, on which said pulley 5 is mounted. The shaft 6 issuitably mounted in the bed 3, also carries a smaller pulley 7, a spur-gear 8, end a bevelgear 9. The pulley '7 carries a belt .10, which also passes over a pulley 11 at the other which pulley 11 is on a able supports 2. oien ily all and which also carries a pinion 13 and bevelgear 14, similar to the gears 8 and 9, respectively. The bevel-gear Mmeshes with a corresponding gear 15, which has a vertical shaft 16 ;nounted in the bed 3 and which carries at its upper end a feedroller 17, which in the present instance is shown suitable for tubing This is also true of the other rollers herein shown, and so will not be further referred to, as it is ob ious that these rollers are always given a sh; Q6 to correspond to the cross-section of the ifitlt'l fed to them and straightened by the mac 11:118. Opposite the roller 17 is an identical on 18, mounted loosely a stud-shaft l9, fixi d in. the bed 3. Sher more ositive aciii be required, the 8 coulebe mount d to ars Will l1 the vroller -i 7, a

l feed-rolls in statement eque zontel rol Should more springs this case, in which only one of each pair is shown as positively driven, because the construction. is somew lat simplified for the purpos s oi ilhistration. It is obvious that both ch pair may be positively driven, if desired. The sp ur-gear 1.3 meshes with a similar gear 19 on a horizontal shaft 20, which passes through a bearing 21, projecting upwardly from the bed 3, and preferably is inte ral therewith, and this shaft 20 carries a ro .ler 22, which is identical with the rollers 17 and 18. A stud-shaft 23 in the bearing 21 carries a second roller 24 opposite and identical with the roller 22, but loosely mounted, as is the roller 18. The rolicrs 17 and 18 may be called the vertical feed-rollers and the rollers 22 and 24 the horizontal iced-rollers. As the feed-rollers and their other end of the machine are identical in al respects with those just above described, it sufiici. .it to say that the vertical rollers 2.; are dri'x n from the bevel-gear 9 and the hori- .'s 26 are driven by the gear 8. The straightoiling-rollers of this machine may also be divided into two sets and designated, as the feed-rollers, as horizontal and vertical. The vertical rollers 27 are each loosely mounted on stud-shafts 28, fixed in guide-plates 2'9, which move laterally of the machine and horizontally in guides 30, preferably integral with the bed 3. Three sets of these rollers 27 are shown, which is the pref-- orable number, although more or loss may employed, and each of the plates 29 is provided with a vertical and downwardly-extending stud 31, "which rests in the slotted end of a horizontal lever 32., These levers 32 are pivoted at 33 between the studs 31.

Springs 34, resting against the ends of the center plate 29 and also against lugs 35, tend to hold the plates 29 and their rollers 27 true and in symmetrical relation to the axis of the machine, so that a straight bar or tube would pass freely through the machine. The horizontal straightening-rollers 36 are similarly mounted on studs 37, fixed in verticallymovable plates 38, sliding in guides 89, referably integral with the bed 3, and t ese plates ,38 have at their upper ends horizontally-disposed studs 40, connected by levers mountings at the I ll, fulcrumed at 4:2,all substantially shniiar to the levers end. their mounting, as above described iloiled springs 48 rest under the vertical plates 38 and hold the some true. he desired, they may be -n rw'n and described. the

added. As shove bar.

levers 32 and 41 are pivoted about midway of their lengths; but. this is not necessary or even desirable for certain classes of work which must be bent back upon itself more than it is out of alinement. In such a case the pivots 3b and 42 should be correspondingly shifted to permit this action, and so are adjustably mounted with slots 44; in the levers 32 and 45 in the standards 39, wherebythis adjustment can readily be made. This adjustment may be made by any suitable means, one form only being shown.

From the foregoing, the operation of my improved machine will be readily under stood. When a bent bar or tube is fed into the machine by the rollers 17 and 18, it passes through the rollers 22 and 24, all of which feed, but do not tend to straighten, the The bar then passes on to the first set of straightening-rellers 27, which immediately move laterally of the bed 3 of the ma chine according, to the amount apd direction of the bend in the b'ar or tube. "The slide 29 of these rollers readily permits this ,fbut as the first plate 29 assumeslanew position the levers 32 cause the otherp'lates 29 to'move correspondingly against the action of the springs 34, so that the middle plate 29 is shifted a proportional distance laterally, but in the opposite direction, and the third or end plate 29 is shifted an equal distance in the same direction as the first plate 29. The bar or tube would then pass through the first rollers 27 and perhaps the second set 27 without being straightened, but by simply moving on in the direction of its curvature; but even if the second set of rollers 27 did not tend to straighten the bar the third set 27 would bend it back upon itself an. amount proportional to what it would be out of true between the first two sets of rollers 27, so

. that it would be bent true, and as the bar or the horizontal rollers 36, mounted in a similar manner and which act in the same a except in a vertical instead of a llOllZOLLil-l simultaneous plane, The result of the action of these rollers 27 and 36 is a compound one which will straighten out any curve in any direction provided the bar or tube is not too much bent to pass the feedrollers when entering into the machine. If the bond is too great to be taken out when passing through the machine once, it may be passed through twice or more or through several'machines in tandem or through one machine with more tha'n one set of each of the straightening-rollers.

2.-In a machine of the class described, I

feeding-rollers, straightening-rollers mounted in pairs, means for causm one'set of ears to move simultaneously an transverse yet the machine in a horizontal plane.

3. In a machine of the class described, feeding-rollers, straightening-rollers mounted in pairs, means for causin one set of airs to move simultaneously ant? transverse y :of the machine and in-a' vertical plane.

4. In a machine of the class described, feeding-rollers, straightening-rollers mount-v ed-in pairs means to cause'one set of pairs to,

move simultaneously and transversely of the machine 1n a horizontal plane and means for causing another set of said pairs to move si-- multaneously and transversely of the machine in a vertical plane. p

Signed this 7th ay of February, 1906.

'.lAZEWELL GILMER. Witnesses:

D. J. MULoAnr, J. R. Huenns. 

